The Compendium of Caraka 4.4.30

4.4.30

yatastu kārtsnyenāvinaśyan vikṛtimāpadyate, tadnuvyākhyāsyāmaḥ---yadā striyā doṣaprakopaṇoktānyāsevamānāyā doṣāḥ prakupitāḥ śarīramupasarpantaḥ śoṇitagarbhāśayāvupapadyate, na ca kārtsnyena śoṇitagarbhāśayau dūṣayanti, tadeyaṃ garbhaṃ labhate strī; tadā tasya garbhasya mātṛjānāmavayavānāmanyatamo 'avayavo vikṛtimāpadyata eko 'athavā 'aneke, yasya yasya hyavayavasya bīje bījabhāge vā doṣāḥ prakopamāpadyante, taṃ tamavayavaṃ vikṛtirāviśati/

As to why, without perishing entirely, it undergoes deformity, that we shall now explain: When, in a woman indulging in things said to provoke the doṣas, the provoked doṣas moving through the body reach the ovum and the uterus, but do not vitiate the ovum and the uterus entirely, then this woman conceives an embryo; then, of that embryo, one or many of the parts derived from the mother undergo deformity. For whichever part's seed or seed-part the doṣas become provoked in, into that very part deformity enters.